Whisk continuously as the egg whites warm-up and keep whisking until all the sugar has dissolved.
Whisk continuously as the egg whites warm-up and keep whisking until all the sugar has dissolved.
Place the bowl of cooked egg whites in your stand mixer fitted with the whisk attachment and beat on medium-high speed until a meringue with stiff peaks forms.
Place the bowl of cooked egg whites in your stand mixer fitted with the whisk attachment and beat on medium-high speed until a meringue with stiff peaks forms.
While the egg whites are beating, melt the chocolate and let it cool down to room temperature.
While the egg whites are beating, melt the chocolate and let it cool down to room temperature.
With the mixer on medium-high speed, feed in a cube of room temperature butter at a time, allowing it to incorporate fully before adding the next cube.
With the mixer on medium-high speed, feed in a cube of room temperature butter at a time, allowing it to incorporate fully before adding the next cube.